The purpose of systems design is to specify a（n）（1），which defines the technologies to be used to build the proposed information systems. This task is accomplished by analyzing the data models and process models that were initially created during （2） . The（3） is used to establish physical processes and data stores across a network .To complete this activity, the analyst may involve a number of system designers and （4），which maybe involved in this activity to help address business data，process，and location issues.The key inputs to this task are the facts， recommendations，and opinions that are solicited from var1ous sources and the approved （5） from the decision analysis phase.

requirements analysis

problem analysis

cause-effect analysis

decision analysis

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答案：

解析：

根据题目描述，系统设计的目的是确定一个应用架构，该架构定义了用于构建提议的信息系统的技术。这个任务通过分析最初在需求分析期间创建的数据模型和流程模型来完成。因此，正确答案是A，即需求分析。其他选项如问题分析、因果分析、决策分析虽然都是与系统设计和信息系统相关的概念，但在这个上下文中不符合题目的描述。

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